Need a book? Engineering books recommendations...
Re: Completly shearing a building (also answer to perforatedshearwalls)[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: Completly shearing a building (also answer to perforatedshearwalls)
- From: Seaintonln(--nospam--at)aol.com
- Date: Tue, 14 Sep 1999 14:33:13 EDT
In a message dated 9/13/1999 9:20:33 PM Pacific Daylight Time, BD2PE(--nospam--at)aol.com writes: << Dennis, I have been trying to just lurk here in the background but can not. Does it really matter? Do you really believe that the addiion of shear at the areas that were not included in your design will reduce the strength of your building? How many buildings have been built with no engineering throuhgout this country with out and engineer and they are performing more than adequately? I think sometimes we as engineers over estimate our importance. Just my thoughts. Brian Dunagan, P.E. P.S. Where are the bodies? >> Brian, to a degree I agree with you. However, this was not the intent of my message. My post was to hypothesis the intent of the strict code compliance that we are to follow based compared to the reality of what will be constructed in the field. I not only agree with you, but would personally be willing to state that compliance to past codes without conformance with torsion design (rigid diaphragm analysis) is more than sufficient as long as the structure is properly detailed and tied together. My issue was to ask the community (mostly those from seismology if listening) how we should address the differences occuring from the design numbers to what will be constructed in the field. If the structure is entirely sheathed, while designed for only necessary shear resistance, then, theoretically, the balance of distribution of force will change based on the uncalculated stiffness of the walls that are not specifically designed to resist shear. These walls, however, will or should come into play at some point of deflection of the designated walls - but were not considered in the original design. Are we expected to recalculate the structure? Who is to pay? Are we liable for "any" damage that an expert witness claims to be caused by the redistribution of shear caused by construction? Are we liable for changes in stiffness if the contractor decides it is less costly to place nails at 3" on center for all walls rather than try and follow a schedule? In a cynical way I am agreeing with your comments "where are the bodies". After two custom homes, I am convinced that this is not a good methodology. Dennis
- Prev by Subject: Re: Completly shearing a building (also answer toperforatedshearwalls)
- Next by Subject: Re: Completly shearing a building (also answer to perforatedshearwalls) -Reply
- Previous by thread: "leave seanit"
- Next by thread: Re: Completly shearing a building (also answer to perforatedshearwalls) -Reply